1057670640 has 480 divisors, whose sum is σ = 4240978560. Its totient is φ = 234381312.

The previous prime is 1057670633. The next prime is 1057670671. The reversal of 1057670640 is 460767501.

1057670640 is a `hidden beast` number, since 1 + 0 + 5 + 7 + 6 + 7 + 0 + 640 = 666.

It is a super-2 number, since 2×1057670640² = 2237334365436019200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 1057670595 and 1057670604.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 45985669 + ... + 45985691.

It is an arithmetic number, because the mean of its divisors is an integer number (8835372).

Almost surely, 2^1057670640 is an apocalyptic number.

1057670640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1057670640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2120489280).

1057670640 is an abundant number, since it is smaller than the sum of its proper divisors (3183307920).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1057670640 is a wasteful number, since it uses less digits than its factorization.

1057670640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106 (or 63 counting only the distinct ones).

The product of its (nonzero) digits is 35280, while the sum is 36.

The square root of 1057670640 is about 32521.8486559421. The cubic root of 1057670640 is about 1018.8654050703.

The spelling of 1057670640 in words is "one billion, fifty-seven million, six hundred seventy thousand, six hundred forty".